I have taught students from the age of 4 - 55, on all brass instruments, both at school and private lessons at home, but recommend starting after 8yrs unless the child is very dedicated to learning.
I believe in individual lessons, rather than groups. so that student can learn at their own pace and achieve the most out of their lessons. I have placed many students through the exam process (grade 1-7), with 100% pass rate. I am also able to teach theory.